哪种心律失常不需紧急处理()。A．一度房室传导阻滞 B．室性早搏R落在T上 C．室性

阅读理解。

     In most parts of the world, many students help their schools make less

pollution(污染)．They join "environment(环境)club"．In an environment

club,people work together to make our environment clean．

     Here are some things students often do．

     No - garbage(垃圾)lunches．How much do you throw away after lunch?Environment clubs ask students to bring their lunches in bags that can be

used again．Every week they will choose the classes that make the least

garbage and report them to the whole school．

     No - car day．On a no-car day,nobody comes to school in a car not the

students and not the teachers．Cars give pollution to our air,so remember:

walk,jump,bike,or run! Use your legs! It's lots of fun!

     Turn off the water! Did you know that toilets(抽水马桶)can waste twenty to forty tons(吨)of water an hour?In a year,that would fill in a small river! In the environment clubs,students mend those broken toilets．

     We love our environment．Let's work together to make it clean．

1．Environment clubs ask students ________

A．to run to school every day．    

B．to take exercise every day．

C．not to throw away lunch bags．

2．From the passage we know the students usually have lunch ________．

A．at school    

B．in shops    

C．in clubs

3．On a no-car day,________ will take a car to school．

A．both students and teachers    

B．only students

C．neither students nor teachers

4．After students mend toilets,they save ________．

A．a small river    

B．a club    

C．a lot of water

5．The writer wrote the passage to ask students to ________．

A．clean school    

B．make less pollution

C．join clubs

在装车量（）的粮库，常使用移动式带式输送机直接装火车，利用输送机的移动和车厢的移动，把整列车装满。

A.大

B.不大

C.特别大

D.较大

关于参数估计，下列说法错误的是（）。

A．若是θ的无偏估计，则-θ是估计量与真值θ的偏差，且是随机的

B．样本均值是总体均值μ的无偏估计

C．样本标准差s是总体标准差的无偏估计

D．样本方差s²是总体方差σ²的无偏估计

（）能比较灵活地按照借款人的还款能力规划还款进度，真正满足个性化需求。

A.到期一次还本付息法

B.等额本息还款法

C.等额本金还款法

D.组合还款法